1 | /*! |
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2 | \file ep_scan.cpp |
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3 | \since 2 may 2016 |
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4 | |
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5 | \brief Definitions of MPI collective function: MPI_Exscan |
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6 | */ |
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7 | |
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8 | #include "ep_lib.hpp" |
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9 | #include <mpi.h> |
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10 | #include "ep_declaration.hpp" |
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11 | #include "ep_mpi.hpp" |
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12 | |
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13 | using namespace std; |
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14 | |
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15 | namespace ep_lib |
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16 | { |
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17 | template<typename T> |
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18 | T max_op(T a, T b) |
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19 | { |
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20 | return max(a,b); |
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21 | } |
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22 | |
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23 | template<typename T> |
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24 | T min_op(T a, T b) |
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25 | { |
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26 | return min(a,b); |
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27 | } |
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28 | |
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29 | template<typename T> |
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30 | void reduce_max(const T * buffer, T* recvbuf, int count) |
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31 | { |
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32 | transform(buffer, buffer+count, recvbuf, recvbuf, max_op<T>); |
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33 | } |
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34 | |
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35 | template<typename T> |
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36 | void reduce_min(const T * buffer, T* recvbuf, int count) |
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37 | { |
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38 | transform(buffer, buffer+count, recvbuf, recvbuf, min_op<T>); |
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39 | } |
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40 | |
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41 | template<typename T> |
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42 | void reduce_sum(const T * buffer, T* recvbuf, int count) |
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43 | { |
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44 | transform(buffer, buffer+count, recvbuf, recvbuf, std::plus<T>()); |
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45 | } |
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46 | |
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47 | |
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48 | int MPI_Exscan_local(const void *sendbuf, void *recvbuf, int count, MPI_Datatype datatype, MPI_Op op, MPI_Comm comm) |
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49 | { |
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50 | valid_op(op); |
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51 | |
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52 | int ep_rank_loc = comm.ep_comm_ptr->size_rank_info[1].first; |
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53 | int num_ep = comm.ep_comm_ptr->size_rank_info[1].second; |
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54 | int mpi_rank = comm.ep_comm_ptr->size_rank_info[2].first; |
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55 | |
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56 | |
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57 | ::MPI_Aint datasize, lb; |
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58 | ::MPI_Type_get_extent(to_mpi_type(datatype), &lb, &datasize); |
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59 | |
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60 | if(ep_rank_loc == 0 && mpi_rank != 0) |
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61 | { |
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62 | comm.my_buffer->void_buffer[0] = recvbuf; |
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63 | } |
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64 | if(ep_rank_loc == 0 && mpi_rank == 0) |
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65 | { |
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66 | comm.my_buffer->void_buffer[0] = const_cast<void*>(sendbuf); |
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67 | } |
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68 | |
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69 | |
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70 | MPI_Barrier_local(comm); |
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71 | |
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72 | memcpy(recvbuf, comm.my_buffer->void_buffer[0], datasize*count); |
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73 | |
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74 | MPI_Barrier_local(comm); |
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75 | |
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76 | comm.my_buffer->void_buffer[ep_rank_loc] = const_cast<void*>(sendbuf); |
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77 | |
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78 | MPI_Barrier_local(comm); |
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79 | |
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80 | if(op == MPI_SUM) |
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81 | { |
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82 | if(datatype == MPI_INT && datasize == sizeof(int)) |
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83 | { |
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84 | for(int i=0; i<ep_rank_loc; i++) |
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85 | reduce_sum<int>(static_cast<int*>(comm.my_buffer->void_buffer[i]), static_cast<int*>(recvbuf), count); |
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86 | } |
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87 | |
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88 | else if(datatype == MPI_FLOAT && datasize == sizeof(float)) |
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89 | { |
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90 | for(int i=0; i<ep_rank_loc; i++) |
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91 | reduce_sum<float>(static_cast<float*>(comm.my_buffer->void_buffer[i]), static_cast<float*>(recvbuf), count); |
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92 | } |
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93 | |
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94 | |
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95 | else if(datatype == MPI_DOUBLE && datasize == sizeof(double)) |
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96 | { |
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97 | for(int i=0; i<ep_rank_loc; i++) |
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98 | reduce_sum<double>(static_cast<double*>(comm.my_buffer->void_buffer[i]), static_cast<double*>(recvbuf), count); |
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99 | } |
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100 | |
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101 | else if(datatype == MPI_CHAR && datasize == sizeof(char)) |
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102 | { |
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103 | for(int i=0; i<ep_rank_loc; i++) |
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104 | reduce_sum<char>(static_cast<char*>(comm.my_buffer->void_buffer[i]), static_cast<char*>(recvbuf), count); |
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105 | } |
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106 | |
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107 | else if(datatype == MPI_LONG && datasize == sizeof(long)) |
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108 | { |
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109 | for(int i=0; i<ep_rank_loc; i++) |
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110 | reduce_sum<long>(static_cast<long*>(comm.my_buffer->void_buffer[i]), static_cast<long*>(recvbuf), count); |
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111 | } |
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112 | |
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113 | else if(datatype == MPI_UNSIGNED_LONG && datasize == sizeof(unsigned long)) |
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114 | { |
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115 | for(int i=0; i<ep_rank_loc; i++) |
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116 | reduce_sum<unsigned long>(static_cast<unsigned long*>(comm.my_buffer->void_buffer[i]), static_cast<unsigned long*>(recvbuf), count); |
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117 | } |
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118 | |
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119 | else printf("datatype Error\n"); |
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120 | |
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121 | |
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122 | } |
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123 | |
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124 | else if(op == MPI_MAX) |
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125 | { |
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126 | if(datatype == MPI_INT && datasize == sizeof(int)) |
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127 | for(int i=0; i<ep_rank_loc; i++) |
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128 | reduce_max<int>(static_cast<int*>(comm.my_buffer->void_buffer[i]), static_cast<int*>(recvbuf), count); |
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129 | |
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130 | else if(datatype == MPI_FLOAT && datasize == sizeof(float)) |
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131 | for(int i=0; i<ep_rank_loc; i++) |
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132 | reduce_max<float>(static_cast<float*>(comm.my_buffer->void_buffer[i]), static_cast<float*>(recvbuf), count); |
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133 | |
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134 | else if(datatype == MPI_DOUBLE && datasize == sizeof(double)) |
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135 | for(int i=0; i<ep_rank_loc; i++) |
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136 | reduce_max<double>(static_cast<double*>(comm.my_buffer->void_buffer[i]), static_cast<double*>(recvbuf), count); |
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137 | |
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138 | else if(datatype == MPI_CHAR && datasize == sizeof(char)) |
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139 | for(int i=0; i<ep_rank_loc; i++) |
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140 | reduce_max<char>(static_cast<char*>(comm.my_buffer->void_buffer[i]), static_cast<char*>(recvbuf), count); |
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141 | |
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142 | else if(datatype == MPI_LONG && datasize == sizeof(long)) |
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143 | for(int i=0; i<ep_rank_loc; i++) |
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144 | reduce_max<long>(static_cast<long*>(comm.my_buffer->void_buffer[i]), static_cast<long*>(recvbuf), count); |
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145 | |
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146 | else if(datatype == MPI_UNSIGNED_LONG && datasize == sizeof(unsigned long)) |
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147 | for(int i=0; i<ep_rank_loc; i++) |
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148 | reduce_max<unsigned long>(static_cast<unsigned long*>(comm.my_buffer->void_buffer[i]), static_cast<unsigned long*>(recvbuf), count); |
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149 | |
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150 | else printf("datatype Error\n"); |
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151 | } |
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152 | |
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153 | else //if(op == MPI_MIN) |
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154 | { |
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155 | if(datatype == MPI_INT && datasize == sizeof(int)) |
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156 | for(int i=0; i<ep_rank_loc; i++) |
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157 | reduce_min<int>(static_cast<int*>(comm.my_buffer->void_buffer[i]), static_cast<int*>(recvbuf), count); |
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158 | |
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159 | else if(datatype == MPI_FLOAT && datasize == sizeof(float)) |
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160 | for(int i=0; i<ep_rank_loc; i++) |
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161 | reduce_min<float>(static_cast<float*>(comm.my_buffer->void_buffer[i]), static_cast<float*>(recvbuf), count); |
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162 | |
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163 | else if(datatype == MPI_DOUBLE && datasize == sizeof(double)) |
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164 | for(int i=0; i<ep_rank_loc; i++) |
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165 | reduce_min<double>(static_cast<double*>(comm.my_buffer->void_buffer[i]), static_cast<double*>(recvbuf), count); |
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166 | |
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167 | else if(datatype == MPI_CHAR && datasize == sizeof(char)) |
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168 | for(int i=0; i<ep_rank_loc; i++) |
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169 | reduce_min<char>(static_cast<char*>(comm.my_buffer->void_buffer[i]), static_cast<char*>(recvbuf), count); |
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170 | |
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171 | else if(datatype == MPI_LONG && datasize == sizeof(long)) |
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172 | for(int i=0; i<ep_rank_loc; i++) |
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173 | reduce_min<long>(static_cast<long*>(comm.my_buffer->void_buffer[i]), static_cast<long*>(recvbuf), count); |
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174 | |
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175 | else if(datatype == MPI_UNSIGNED_LONG && datasize == sizeof(unsigned long)) |
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176 | for(int i=0; i<ep_rank_loc; i++) |
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177 | reduce_min<unsigned long>(static_cast<unsigned long*>(comm.my_buffer->void_buffer[i]), static_cast<unsigned long*>(recvbuf), count); |
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178 | |
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179 | else printf("datatype Error\n"); |
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180 | } |
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181 | |
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182 | MPI_Barrier_local(comm); |
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183 | |
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184 | } |
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185 | |
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186 | int MPI_Exscan(const void *sendbuf, void *recvbuf, int count, MPI_Datatype datatype, MPI_Op op, MPI_Comm comm) |
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187 | { |
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188 | if(!comm.is_ep) |
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189 | { |
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190 | return ::MPI_Scan(sendbuf, recvbuf, count, to_mpi_type(datatype), to_mpi_op(op), to_mpi_comm(comm.mpi_comm)); |
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191 | } |
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192 | |
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193 | valid_type(datatype); |
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194 | |
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195 | int ep_rank = comm.ep_comm_ptr->size_rank_info[0].first; |
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196 | int ep_rank_loc = comm.ep_comm_ptr->size_rank_info[1].first; |
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197 | int mpi_rank = comm.ep_comm_ptr->size_rank_info[2].first; |
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198 | int ep_size = comm.ep_comm_ptr->size_rank_info[0].second; |
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199 | int num_ep = comm.ep_comm_ptr->size_rank_info[1].second; |
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200 | int mpi_size = comm.ep_comm_ptr->size_rank_info[2].second; |
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201 | |
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202 | ::MPI_Aint datasize, lb; |
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203 | ::MPI_Type_get_extent(to_mpi_type(datatype), &lb, &datasize); |
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204 | |
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205 | void* tmp_sendbuf; |
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206 | tmp_sendbuf = new void*[datasize * count]; |
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207 | |
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208 | int my_src = 0; |
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209 | int my_dst = ep_rank; |
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210 | |
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211 | std::vector<int> my_map(mpi_size, 0); |
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212 | |
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213 | for(int i=0; i<comm.rank_map->size(); i++) my_map[comm.rank_map->at(i).second]++; |
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214 | |
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215 | for(int i=0; i<mpi_rank; i++) my_src += my_map[i]; |
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216 | my_src += ep_rank_loc; |
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217 | |
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218 | |
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219 | for(int i=0; i<mpi_size; i++) |
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220 | { |
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221 | if(my_dst < my_map[i]) |
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222 | { |
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223 | my_dst = get_ep_rank(comm, my_dst, i); |
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224 | break; |
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225 | } |
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226 | else |
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227 | my_dst -= my_map[i]; |
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228 | } |
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229 | |
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230 | if(ep_rank != my_dst) |
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231 | { |
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232 | MPI_Request request[2]; |
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233 | MPI_Status status[2]; |
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234 | |
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235 | MPI_Isend(sendbuf, count, datatype, my_dst, my_dst, comm, &request[0]); |
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236 | |
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237 | MPI_Irecv(tmp_sendbuf, count, datatype, my_src, ep_rank, comm, &request[1]); |
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238 | |
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239 | MPI_Waitall(2, request, status); |
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240 | } |
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241 | |
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242 | else memcpy(tmp_sendbuf, sendbuf, datasize*count); |
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243 | |
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244 | |
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245 | void* tmp_recvbuf; |
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246 | tmp_recvbuf = new void*[datasize * count]; |
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247 | |
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248 | MPI_Reduce_local(tmp_sendbuf, tmp_recvbuf, count, datatype, op, 0, comm); |
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249 | |
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250 | if(ep_rank_loc == 0) |
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251 | ::MPI_Exscan(MPI_IN_PLACE, tmp_recvbuf, count, to_mpi_type(datatype), to_mpi_op(op), to_mpi_comm(comm.mpi_comm)); |
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252 | |
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253 | // printf(" ID=%d : %d %d \n", ep_rank, static_cast<int*>(tmp_recvbuf)[0], static_cast<int*>(tmp_recvbuf)[1]); |
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254 | |
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255 | MPI_Exscan_local(tmp_sendbuf, tmp_recvbuf, count, datatype, op, comm); |
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256 | |
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257 | // printf(" ID=%d : after local tmp_sendbuf = %d %d ; tmp_recvbuf = %d %d \n", ep_rank, static_cast<int*>(tmp_sendbuf)[0], static_cast<int*>(tmp_sendbuf)[1], static_cast<int*>(tmp_recvbuf)[0], static_cast<int*>(tmp_recvbuf)[1]); |
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258 | |
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259 | |
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260 | |
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261 | if(ep_rank != my_src) |
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262 | { |
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263 | MPI_Request request[2]; |
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264 | MPI_Status status[2]; |
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265 | |
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266 | MPI_Isend(tmp_recvbuf, count, datatype, my_src, my_src, comm, &request[0]); |
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267 | |
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268 | MPI_Irecv(recvbuf, count, datatype, my_dst, ep_rank, comm, &request[1]); |
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269 | |
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270 | MPI_Waitall(2, request, status); |
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271 | } |
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272 | |
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273 | else memcpy(recvbuf, tmp_recvbuf, datasize*count); |
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274 | |
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275 | |
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276 | |
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277 | |
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278 | delete[] tmp_sendbuf; |
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279 | delete[] tmp_recvbuf; |
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280 | |
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281 | } |
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282 | |
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283 | } |
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